extensions/browser/url_request_util.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "extensions/browser/url_request_util.h"
   6
   7 #include <string>
   8
   9 #include "content/public/browser/resource_request_info.h"
  10 #include "extensions/browser/guest_view/web_view/web_view_renderer_state.h"
  11 #include "extensions/browser/info_map.h"
  12 #include "extensions/common/extension.h"
  13 #include "extensions/common/manifest_handlers/icons_handler.h"
  14 #include "extensions/common/manifest_handlers/web_accessible_resources_info.h"
  15 #include "extensions/common/manifest_handlers/webview_info.h"
  16 #include "net/url_request/url_request.h"
  17
  18 namespace extensions {
  19 namespace url_request_util {
  20
  21 bool AllowCrossRendererResourceLoad(net::URLRequest* request,
  22                                     bool is_incognito,
  23                                     const Extension* extension,
  24                                     InfoMap* extension_info_map,
  25                                     bool* allowed) {
  26   const content::ResourceRequestInfo* info =
  27       content::ResourceRequestInfo::ForRequest(request);
  28
  29   // Extensions with webview: allow loading certain resources by guest renderers
  30   // with privileged partition IDs as specified in the manifest file.
  31   std::string partition_id;
  32   bool is_guest = WebViewRendererState::GetInstance()->GetPartitionID(
  33       info->GetChildID(), &partition_id);
  34   std::string resource_path = request->url().path();
  35   if (is_guest && WebviewInfo::IsResourceWebviewAccessible(
  36                       extension, partition_id, resource_path)) {
  37     *allowed = true;
  38     return true;
  39   }
  40
  41   // If the request is for navigations outside of webviews, then it should be
  42   // allowed. The navigation logic in CrossSiteResourceHandler will properly
  43   // transfer the navigation to a privileged process before it commits.
  44   if (content::IsResourceTypeFrame(info->GetResourceType()) && !is_guest) {
  45     *allowed = true;
  46     return true;
  47   }
  48
  49   if (!ui::PageTransitionIsWebTriggerable(info->GetPageTransition())) {
  50     *allowed = false;
  51     return true;
  52   }
  53
  54   // The following checks require that we have an actual extension object. If we
  55   // don't have it, allow the request handling to continue with the rest of the
  56   // checks.
  57   if (!extension) {
  58     *allowed = true;
  59     return true;
  60   }
  61
  62   // Disallow loading of packaged resources for hosted apps. We don't allow
  63   // hybrid hosted/packaged apps. The one exception is access to icons, since
  64   // some extensions want to be able to do things like create their own
  65   // launchers.
  66   std::string resource_root_relative_path =
  67       request->url().path().empty() ? std::string()
  68                                     : request->url().path().substr(1);
  69   if (extension->is_hosted_app() &&
  70       !IconsInfo::GetIcons(extension)
  71            .ContainsPath(resource_root_relative_path)) {
  72     LOG(ERROR) << "Denying load of " << request->url().spec() << " from "
  73                << "hosted app.";
  74     *allowed = false;
  75     return true;
  76   }
  77
  78   // Extensions with web_accessible_resources: allow loading by regular
  79   // renderers. Since not all subresources are required to be listed in a v2
  80   // manifest, we must allow all loads if there are any web accessible
  81   // resources. See http://crbug.com/179127.
  82   if (extension->manifest_version() < 2 ||
  83       WebAccessibleResourcesInfo::HasWebAccessibleResources(extension)) {
  84     *allowed = true;
  85     return true;
  86   }
  87
  88   // Couldn't determine if the resource is allowed or not.
  89   return false;
  90 }
  91
  92 bool IsWebViewRequest(const net::URLRequest* request) {
  93   const content::ResourceRequestInfo* info =
  94       content::ResourceRequestInfo::ForRequest(request);
  95   // |info| can be NULL sometimes: http://crbug.com/370070.
  96   if (!info)
  97     return false;
  98   return WebViewRendererState::GetInstance()->IsGuest(info->GetChildID());
  99 }
 100
 101 }  // namespace url_request_util
 102 }  // namespace extensions